Basswood

After getting off to a late, slow start this season, Japanese Beetle numbers have risen dramatically with high populations being reported in various parts of the state. However, not everyone is seeing heavy damage. Thus far, the population distribution is remaining highly localized.

BYGL readers should be familiar with the Basswood Leafminer (Baliosus nervosus; previously Baliosus ruber).  We've reported on the skeletonizing and leafmining activities of this native beetle for years.  High populations cause entire trees to become reddish-brown, usually in mid-to-late August.